How to convert seconds to minutes in Dart?

Question

I'm learning Dart & flutter for 2 days and I'm confused about how to convert seconds (for example 1500sec) to minutes.

For studying the new language, I'm making Pomodoro timer, and for test purposes, I want to convert seconds to MM: SS format. So far, I got this code below, but I'm stuck for a couple of hours now... I googled it but could not solve this problem, so I used Stackoverflow. How should I fix the code?

int timeLeftInSec = 1500;
void startOrStop() {
  timer = Timer.periodic(Duration(seconds: 1), (timer) {
    setState(() {
      if (timeLeftInSec > 0) {
        timeLeftInSec--;
        timeLeft = Duration(minutes: ???, seconds: ???)
      } else {
        timer.cancel();
      }
    }
  }
}

You are allowed to put more that 60 seconds as parameter to `Duration`. — julemand101, May 27 '20 at 14:49
Duplicate of https://stackoverflow.com/questions/54775097/formatting-a-duration-like-hhmmss ? — Huiting, May 27 '20 at 14:50
Does this answer your question? [Formatting a Duration like HH:mm:ss](https://stackoverflow.com/questions/54775097/formatting-a-duration-like-hhmmss) — user1506104, May 27 '20 at 20:10

CopsOnRoad · Answer 1 · 2022-01-18T20:52:56.087

16

Without formatting:

int mins = Duration(seconds: 120).inMinutes; // 2 mins

Formatting:

String formatTime(int seconds) {
  return '${(Duration(seconds: seconds))}'.split('.')[0].padLeft(8, '0');
}

void main() {
  String time = formatTime(3700); // 01:01:11
}

edited Jan 18 '22 at 20:52

answered Aug 11 '20 at 17:23

CopsOnRoad

175,842
51
533
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inMinutes "The returned value can be greater than 59." this answer made me lose 10 minutes chasing the bug thx – cs guy Nov 02 '20 at 15:22

Akash Lilhare · Answer 2 · 2021-11-03T19:20:12.580

10

this code works for me

String formatedTime(int secTime) {
String getParsedTime(String time) {
  if (time.length <= 1) return "0$time";
  return time;
}

int min = secTime ~/ 60;
int sec = secTime % 60;

String parsedTime =
    getParsedTime(min.toString()) + " : " + getParsedTime(sec.toString());

return parsedTime;
}

now just call the function

formatedTime(1500)

formated time example

edited Nov 03 '21 at 19:20

answered Jul 29 '21 at 09:57

Akash Lilhare

215
4
10

score 6 · Accepted Answer · edited May 27 '20 at 15:41

6

You can try this :

int minutes = (seconds / 60).truncate();
String minutesStr = (minutes % 60).toString().padLeft(2, '0');

edited May 27 '20 at 15:41

Augustin R

6,023
2
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answered May 27 '20 at 14:56

griffins

5,390
3
23
46

Thank you it's working now. but why I need to put minutes in String minutesStr = (minutes % 60).toString().padLeft(2, '0');? Minutes is now equal to 1 and minutes % 60 is .0166... I think pad left is gonna add two zeros... – May 28 '20 at 00:09

score 3 · Answer 4 · answered Apr 08 '21 at 13:55

3

This is the way I've achieved desired format of MM:SS

Duration(seconds: _secondsLeft--).toString().substring(2, 7);

Here is an example of what toString method returns:

d = Duration(days: 0, hours: 1, minutes: 10, microseconds: 500);
d.toString();  // "1:10:00.000500"

So with the substring method chained you can easily achive more formats e.g. HH:MM:SS etc.

answered Apr 08 '21 at 13:55

Nikage

548
2
6
18

1

best answer out of all. – Hitesh Kumar Saini Dec 02 '21 at 13:15

score 0 · Answer 5 · answered Jan 20 '22 at 09:52

Check out this piece of code for a count down timer with formatted output

import 'dart:async';

void main(){
  late Timer timer;
  int startSeconds = 120; //time limit
  String timeToShow = "";
  timer =  Timer.periodic(Duration(seconds:1 ),(time){
    startSeconds = startSeconds-1;
    if(startSeconds ==0){
      timer.cancel();
     }

    int minutes = (startSeconds/60).toInt();
    int seconds = (startSeconds%60);
   timeToShow = minutes.toString().padLeft(2,"0")+"."+seconds.toString().padLeft(2,"0");
   print(timeToShow);
  });
}

    /*output
    01.59
    01.58 
    01.57
    ...
    ...
    ...
    00.02
    00.01
    00.00*/

How to convert seconds to minutes in Dart?

5 Answers5